Elevator



H. c. ANDERSON.

ELEVATOR.

APPLICATION FILED MAYIO. 1918.

- Patented Apr. 25, 1922.

l T:lIE'lVRJY'CJ. ANDERSON, OLE CHICAGQ: ILLINOIS, ASSIGN'OR TO REIII'ANC ELEVATOI?, i

COMPANY, on CHICAGO,

ILLINOIS.

ELEVATOR.

Specification of LettersPatent.

Patented Ap1'.v`2j5 1922.

.Application led May 10, 1918.l Serial No. 233,623.

TouZZ fio/wm if may Genicom.'

Be it known that I, HENRY C. ANDERSON, a citizen of the United States, residing at Chicago, in the county of'Cook and State of Illinois, have invented a certain new and useful Improvement in Elevators,of which the following is a full, clear, concise and exact description, reference being had: tothe accompanying drawings, forming a part of this specification.

domore vparticularly with the -provision of a bearingconstruction in which the drum-driving shaft andf-its worm may be withdrawn from the frame or housing and in which but a single thrust bearing is provided for the worm shaft `at one end and aplain bearing` at the other end 'extending through a hub cast preferably integrally with the wall' Hof't-hev frame; IIeretofore in traction machines for elevators'the frame Awhich carries the drum driving gear'and worm was provided withan enlarged bearing or head at each end of the Worm shaft, these bearings being set into openings in opposite walls of the frame with the shaft extending therethrough `and an intermediately positioned worm thereon.

One of the features of my invention is the provision of a frame for' elevator traction machines which carries a plain or straight' simple bearing in an integral vhub on one Wall and a removable bearing in the other wal'hpreferablv in the' *forni of a `double thrustv 'bearing so astev take the thrust on the shaft in either longitudinal direction, the removable bearing being adaped to `be withdrawn from the frame'so that-the shafft and' its worm mav frame or housing through the'openi'ng'which supports the thrust bearing;

In prior inachiifiesv 'of this chf-araeterre movable heads having bearings vv`e`r`e-.-2pro-- vided in 'eachlvvall of'the"I-na'c'lnnfe'.v In rinafchinos ofV this kind 'the' thrust' isl r'st'in' "one 'direction asfthe'sh'aft is rotated one? way', and' then' the thrustis inthe opposite direc tionas the shaft is reversed. such prior machines this hearing construction has been quite' expensive and' one of the objects of invention is 'to eliminate this expensive 'construction by providing a single thrust bearing infone wall anda plainv aligned bearing inthe opposite wall, the thrust bearing invention relates to traction machines. forv elevators and' has to mounting the 4 Y i Vi'scarried be withdrawn. from the.

.wall if? supports aremovable being preferably a double thrust bearing and removably supported so 'that the vbearing' shaft and worm may be' withdrawn from 'the frame or housing.

For a better tionA 'reference is t be had to the accompany'- Ing drawing, in: which like reference chari actors' indicatel like parts and in which:

understanding of vmyl inven- F 1g. l is a lside elevation ofra tractionf i machine for elevators constructed in accordance with my invention Fig. 2. is a longitudinal sectionalV view through the shaft and bearing of thetraetion machine frame onhousing;

Fig. is a transverse section along the lineJ- of Fig. 2; v f

Fig. 4 shows the split thrust bearing housing; and Y Fig. 5 shows the thrust bearing collar (upon the shaft. Y l

Referring.' novv' preferred form of my invention asl illustrated, it comprises the usual fra-me or housing 6 which includes the drum -w'orni gear 7 adapted to `be driven in either direction byra Worm Scarried by the shaft l() which is connected to 'a source of power in the nature ofa motor 11, the sha-ft l0 and motor shaft being connected through a coupling iny the' brake drum 12. The frame or heus ing 6 has opposed bea-ring supporting walls, the wall 1.3 being provided preferably lwith more particularly tothe preferred Vmethod of a plain 'straight'bearing lei boredfthroun'h i ai hub 14? preferably wall, ar packing nut l5 encircling theV shaft l'OYso as to prevent the escape of oilswhi'ch A in the reservoir 16' for lubricating` the bearings and gearing;

bearinfo" pret! era'bly inthe linrnfof a double thr.v

ingv which is also' s=elfa ligvningf,this

be'aL ng being: inserted- .thlrough ian open 18 in .the wall 117 whic'hisy bored inl align# nient vwith thegbearing wallie* .We This thrust bearing `include's1 a -twoipart 14V in thefopposite cast integral with the i The other or 'spl-it: housing consisting of; a capportion 19 and inner or abutting portion 20 `which parts slide into the bore in the hub'v21'. innerV bearing housing 2O has an abutting shoulder 22 which sets against ay corresponding shoulder in the hub 21 hso that when' the cap portion 1'9fis clamped against the outer The thrust ring 25 being secured take the thrust of the Worm v and the shaft and face ofthe Wall 17 by means of the screws 23, the two portions 19 and 2O are clamped against rotation. The end of 'the shaft 10 which enters the thrust bearing is reduced so as to provide a shoulder vv24 against which the thrust ring 25 abuts, this ring being rigidly supported by a sleeve 26 which slides over the reduced end of the shaft 1() and is held by means of a pin 26a. To accommodate the thrust ring and ball races 27, 28, enlarged recesses 29, 3() are provided in the adjoining ends ofthe housings 19, 2O respectively. rlhe ball races 27, 28 are rounded upontheir outer faces, that is, the faces opposite the bearing parts, and the recesses 29, 30 are correspondingly rounded so as to provide Van automatic or self-aligning ballV bearing. The ball bearings:r1 it will be apparent, will take the thrust of the shaft regardless of the direction of thrust on account of the to the shaft 10, and running between the .opposed circular rows of bearing balls 81. r1`he rotary bearing for the shaft 10 at the thrust end1 is at 32 in the housing 20, the outer end of the shaft 10 along sleeve 26 running freely in the cap 19. T hat is there is a clearance between the sleeve 2G and the hole 33, in cap 19., shovvn in Fig. 2. A slight enlargement is cut in the end of the hole 83 in the cap 19 simply to act as clearance for the end of the shaft;

In vboring the aligned bearings or bearing supports in the opposed Walls of the frame, the frame or housing, which is separated at 34 from the base 35, is fastened to the carriage ofl a suitable boring mil-l, as for instance a lathe, and vthe boring bar with suitable cutters inserted through the bearing openings in the Walls of the housing. A plain or simple straight bearing 14 is bored through the hub on the Wall 13 and an enlarged thrust bearing support V1S bored through the opposite Wall 17. these holes being` bored at one setting so asA to be in perfect alignment.y lt will be apparent that with my preferrer'l Constrnotion -a consider able saving .in expense is made over the pr method in which thrust bearings were provided vin each of the opposed walls to rection. By my improved construction l eliminate one ofthese expensive bearings and providea single bearing which may be readily removed from the one Wall of the housing Worm Withdrawn from the housing through the opening in the vWall which supports the thrust. bearing.

In assembling the frame, shaft and bearing, the bearing housing 20 and ball race 28 are first slipped over the corresponding end ofthe shaft 10 after which the thrust ring 25 and the sleeve 26 are placed over the en d of the shaft and the sleeve 26 secured end to by the pin 26L so as to rigidly hold the formed in one Wall 18 ineach di-l ring 25 in place. The cap 19 and ball race 27 are now slipped over the end of the shaft and the balls 31 inserted after which the bearing housings 19 and 2O are drawn together upon theshaft, the Whole thing being then inserted through the bearing support opening in the Wall 17 and V.the clamping screws 23 drawn up until the shoulder of the housing 2O abuts the corresponding shoulder in the hub. rEhe screws 23 are then drawn up tight so as to securely hold the members 19 and 20 against rotation. The packing nut 15 may then bev placed in position on the other end of the shaft 10 so as to prevent the escape of oil from thereservoir 16. l

For the purpo e of illustrating my invention l have shown a preferredv form but it is te be understood that changes and modilications will readily occur to thosel skilled in the art and therefore 1 do not desire to lee limited to the exact structure as shown and described but aim to cover all that cornesY Within the spirit and scope of the appended claims.

Having thus described my invention, what l; claim as new and desire to secure by Let# ters Patent is: I

1. A device of the character described comprising a frame, a plain bearing` formed on one wall of the frame, a thrust bearing mounted on the opposite ivallof the' frame, a shaft mounted in said bearings. a shoulder on the shaft7 a thrust ringadjacent said shoulder.` a sleeve rigidly serured to tliering and keyed to the shaft and ball bearings contained Within the thrust bearing andl adapted to engage the opposite faces of said thrust ring. f Y

2. 1n a device of the character described the combination of a frame7 a plain bearing of the frame.,V a hub formed on the opposite Wall ofthe frainel a thrust bearing supported bv said -huband a shaft mounted in said bearings.y said tl'irust bearing 'comprising a separable housing, comprising a cap piece and a re ing portion having rounded recelA4 s and hall races having rounded portions adapted to lit saifil rounded recesses, said cap piece b e- Vand ball bearings positioned between said spaced from said sha ft anda thrust ring Y a plain bearing formed r on J i against said shoulder,

ball races andsaid thrust ring and adapted to engage the opposite faces of the thrust rinU.

if? A device of the character described 'comprising a frame, a hub formed on the frame7 a shoulder on said hub, a bearing po- I sitioned against said shoulder, a cap piece positioned in said hub, ball races formed in said bearing and cap piece, a shaft mounted in said bearing, a thrust ring rigidly connected to said shaft and ball bearings positioned between said ball races and said thrust ring and adapted to engage the op- .posite faces of said thrust ring.

5. A traction device for elevators comprising a frame having a plain bearing at bearing at the other4 one end and a thrust end, a shaft mounted in said bearing and having lan intermediately disposed gear adapted when driven to eect an end thrust on the shaft, and a thrust ring immovably secured to said shaft, said thrust bearing comprising separable portions having rounded recesses and ball races having rounded portions adapted to fit said rounded recesses and ball bearings positioned between'said ball races and said thrust ring on both sides of said thrust ring.

6. A thrust bearing comprising a hub havv ing a shoulder formed thereon, a bearing portion supported by the hub and positioned a cap piece having an extension adapted to engage said bear- -ing portion, said extension being supported by the hub and means for moving the cap piece relatively to the hub to clamp said bearing portion against said shoulder.

7. A device of the character described comprising a frame, a plain bearing formed on one wall of the frame, a hub formed on the other wall of the framein alinement with said plain bearingand a thrust bearing supported by said hub, said thrust bearing comprisinfr separable portions, rounded recesses in saic separable portions, ball races having rounded faces adapted to engage said round- Y ed recesses, a shaft supported in said bear` ings and a'thrust ring secured to said shaft and positioned between said ball races and ball bearings positioned between said ball racesl and the opposite faces of said thrust ring.

8. A device of the character described com prising a frame, a plain bearing. formed on f one wall of said frame, a two-part thrustY bearing formed on the other frame, a shaft supported on said plain bearing and one of the parts of said thrust bearing, a thrust ring secured to the shaft and self aligning ball bearings contained within the thrust bearing and interposed between the two parts of said bearing and the thrust ring. v a

9. A tractionmachine for elevators comprising al frame having a bearing atv each end thereof ashaft in saidrbearings having an intermediately disposed gear adapted when driven to effect an end thrust. on the shaft, one ofk said bearings being a plain bearing integral with one of the end-walls of said frame, and ings being a double ably supported in an orifice in the other end wall of said frame, whereby saidshaft and a f gear may be withdrawn through the said ori'ce to remove said shaft from said bearbearing and in a bore extending through said plain bearing' and the other wall'v of said frame, whereby said thrust bearing may be removed tov permit withdrawal ofthe shaft and gear from the frame throughsaidorifice. 4In witness whereof I hereunto subscribe my name 1918. a

HENRY C. ANDERSON.

the other of said bear.` thrust bearing removwall of said ately disposed gear mounted in said thrustV this 23rd day' of ripara, D,Y 

